1133221055 has 4 divisors (see below), whose sum is σ = 1359865272. Its totient is φ = 906576840.

The previous prime is 1133221051. The next prime is 1133221079. The reversal of 1133221055 is 5501223311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1133221055 - 2² = 1133221051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1133221055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133221051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113322101 + ... + 113322110.

It is an arithmetic number, because the mean of its divisors is an integer number (339966318).

Almost surely, 2^1133221055 is an apocalyptic number.

1133221055 is a deficient number, since it is larger than the sum of its proper divisors (226644217).

1133221055 is an equidigital number, since it uses as much as digits as its factorization.

1133221055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226644216.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1133221055 is about 33663.3488381652. The cubic root of 1133221055 is about 1042.5691703822.

Adding to 1133221055 its reverse (5501223311), we get a palindrome (6634444366).

The spelling of 1133221055 in words is "one billion, one hundred thirty-three million, two hundred twenty-one thousand, fifty-five".